在列出节点时，go-client出现未定义错误。

huangapple
go评论122阅读模式
英文:

Undefined error in go-client when listing the nodes

问题

我是你的中文翻译助手，以下是翻译好的内容：

我刚开始学习golang，并尝试使用client-go列出我的minikube集群中的节点。但是我遇到了以下问题：

> nodeList.Items未定义（类型*无效类型没有字段或方法Items）compilerMissingFieldOrMethod

以下是我用于此问题的代码片段：

  1. package main
  3. import (
  4. 	"context"
  5. 	"fmt"
  7. 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  8. 	"k8s.io/client-go/kubernetes"
  9. 	"k8s.io/client-go/tools/clientcmd"
  10. )
  12. func main() {
  13. 	rules := clientcmd.NewDefaultClientConfigLoadingRules()
  14. 	kubeconfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(rules, &clientcmd.ConfigOverrides{})
  15. 	config, err := kubeconfig.ClientConfig()
  16. 	if err != nil {
  17. 		panic(err)
  18. 	}
  19. 	clientset := kubernetes.NewForConfigOrDie(config)
  21. 	nodeList, err := clientset.CoreV1().Nodes().List(context.Background(), metav1.ListOptions{})
  23. 	if err != nil {
  24. 		panic(err)
  25. 	}
  27. 	for _, node := range nodeList.Items {
  28. 		fmt.Printf("%s\n", node.Name)
  29. 	}
  30. }

有人可以帮我看看问题出在哪里吗？

谢谢！

英文:

I am new to golang and I am trying to list the nodes in my minikube cluster with the client-go. And I encounter the following issue:

>nodeList.Items undefined (type *invalid type has no field or method Items)compilerMissingFieldOrMethod

And here's my code snippet for this:

  1. package main
  3. import (
  4. 	"context"
  5. 	"fmt"
  7. 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  8. 	"k8s.io/client-go/kubernetes"
  9. 	"k8s.io/client-go/tools/clientcmd"
  10. )
  12. func main() {
  13. 	rules := clientcmd.NewDefaultClientConfigLoadingRules()
  14. 	kubeconfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(rules, &clientcmd.ConfigOverrides{})
  15. 	config, err := kubeconfig.ClientConfig()
  16. 	if err != nil {
  17. 		panic(err)
  18. 	}
  19. 	clientset := kubernetes.NewForConfigOrDie(config)
  21. 	nodeList, err := clientset.CoreV1().Nodes().List(context.Background(), metav1.ListOptions{})
  23. 	if err != nil {
  24. 		panic(err)
  25. 	}
  27. 	for _, node := range nodeList.Items {
  28. 		fmt.Printf("%s\n", node.Name)
  29. 	}
  30. }

Can someone help me what is the problem here?

Thank you!

答案1

得分: 1

看起来你的clientset没有从你的kubeconfig文件中创建。我建议你按照以下方式创建clientset。我在这里使用了集群外配置来创建clientset。你也可以使用InclusterConfig来创建它。

  1. package main
  3. import (
  4. 	"context"
  5. 	"flag"
  6. 	"fmt"
  7. 	"k8s.io/client-go/kubernetes"
  8. 	"k8s.io/client-go/util/homedir"
  9. 	"path/filepath"
  11. 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  12. 	"k8s.io/client-go/tools/clientcmd"
  13. )
  15. func main() {
  16. 	// 解析.kubeconfig文件
  17. 	var kubeconfig *string
  18. 	if home := homedir.HomeDir(); home != "" {
  19. 		kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) kubeconfig文件的绝对路径")
  20. 	} else {
  21. 		kubeconfig = flag.String("kubeconfig", "", "kubeconfig文件的绝对路径")
  22. 	}
  23. 	flag.Parse()
  25. 	config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
  26. 	if err != nil {
  27. 		panic(err)
  28. 	}
  30. 	// 创建clientset
  31. 	clientset, err := kubernetes.NewForConfig(config)
  32. 	if err != nil {
  33. 		panic(err)
  34. 	}
  36. 	nodeList, err := clientset.CoreV1().Nodes().List(context.Background(), metav1.ListOptions{})
  38. 	if err != nil {
  39. 		panic(err)
  40. 	}
  42. 	for _, node := range nodeList.Items {
  43. 		fmt.Printf("%s\n", node.Name)
  44. 	}
  45. }
英文:

It looks like the clientset is not created from your kubeconfig. I would suggest you to create the clientset in the following way. I have used out of cluster config here to create the clientset. You can also create it using InclusterConfig.

  1. package main
  3. import (
  4. 	"context"
  5. 	"flag"
  6. 	"fmt"
  7. 	"k8s.io/client-go/kubernetes"
  8. 	"k8s.io/client-go/util/homedir"
  9. 	"path/filepath"
  11. 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  12. 	"k8s.io/client-go/tools/clientcmd"
  13. )
  15. func main() {
  16. 	// parse the .kubeconfig file
  17. 	var kubeconfig *string
  18. 	if home := homedir.HomeDir(); home != "" {
  19. 		kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
  20. 	} else {
  21. 		kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
  22. 	}
  23. 	flag.Parse()
  25. 	config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
  26. 	if err != nil {
  27. 		panic(err)
  28. 	}
  30. 	// create the clientset
  31. 	clientset, err := kubernetes.NewForConfig(config)
  32. 	if err != nil {
  33. 		panic(err)
  34. 	}
  36. 	nodeList, err := clientset.CoreV1().Nodes().List(context.Background(), metav1.ListOptions{})
  38. 	if err != nil {
  39. 		panic(err)
  40. 	}
  42. 	for _, node := range nodeList.Items {
  43. 		fmt.Printf("%s\n", node.Name)
  44. 	}
  45. }

huangapple
  • 本文由 发表于 2022年11月17日 17:14:43
  • 转载请务必保留本文链接：https://go.coder-hub.com/74472827.html
  • client-go
  • go
  • kubernetes
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